Glutathione

What is glutathione?

Glutathione is a small molecule made from three amino acids: cysteine, glutamate and glycine. It is produced by the body, with especially high concentrations in the liver, and serves as the most abundant antioxidant inside cells. Glutathione also helps the liver attach to and clear certain drugs and toxins, which is why it is popular in “detox” and liver-support products.

What the research says

For years it was assumed that oral glutathione is broken down during digestion and does little. A 6-month randomized, placebo-controlled trial in 54 healthy adults challenged that view: 250 mg or 1,000 mg a day raised glutathione levels in blood, red blood cells, plasma and other tissues, with larger increases at the higher dose. Levels returned to baseline a month after stopping. Raising body stores, however, is not the same as producing a health benefit.

For liver health specifically, evidence is very early. A small open-label pilot study in Japan gave oral glutathione for four months to people with nonalcoholic fatty liver disease after three months of diet and exercise changes. Among the 29 who completed the study, ALT (a liver enzyme) and triglycerides decreased. Because there was no placebo group, it is impossible to separate the effect of glutathione from continued lifestyle changes, and the authors called for large trials.

There is no good evidence that glutathione supplements help healthy people lose weight or burn liver fat.

How it’s used in supplements

Glutathione is sold in capsules, liposomal liquids and sublingual forms, typically at 250 to 1,000 mg a day in research. In multi-ingredient capsules containing ten or more ingredients, the glutathione content is likely far lower, and in HepatoBurn the amount is not disclosed.

Oral glutathione was well tolerated in the six-month trial. Because data in pregnancy and breastfeeding are lacking, and because people with liver conditions need medical oversight rather than self-treatment, it is sensible to talk to a doctor first, especially if you take medication.

Bottom line: oral glutathione can raise the body’s glutathione stores at doses of 250 to 1,000 mg a day, which is more than was once believed. Whether that translates into meaningful benefits for liver health or weight has not been shown in placebo-controlled trials. Its presence in a multi-ingredient liver blend, at an undisclosed amount, is better seen as a marketing feature than as an evidence-based dose. The body also makes its own glutathione from amino acids in protein-rich foods, so an adequate overall diet remains the foundation for maintaining normal levels.